Thousands of people logged complaints about problems accessing Twitter on Saturday after owner Elon Musk limited most users to viewing 600 tweets a day -- restrictions he described as an attempt to prevent unauthorized scraping of potentially valuable data from the site.
Not quite. It appears to be self inflicted.
https://waxy.org/2023/07/twitter-bug-causes-self-ddos-possibly-causing-elon-musks-emergency-blocks-and-rate-limits-its-amateur-hour/